good things we get from plants 1. oxygen for humans and animals to breath 2. fuel for heating and...
TRANSCRIPT
Good Things We Get From Plants
1. Oxygen for humans and animals to breath
2. Fuel for heating and transportation
3. Building materials
4. Medicines
5. Food for human and animal nutrition
6. Fabric for clothing and other purposes
7. Paper
8. Cover against wind and water
9. Habitat for animals
10. Aesthetics
Roots
1. Anchor Plant2. Absorb water and
minerals3. Translocate water
and minerals to stem4. Store Food
Stems
1. Translocate water, minerals and food to the leaves
2. Support the leaves and display them to light
3. Store Food
Different type of Roots
A. Tap RootContinuation of the primary
rootIdeal for anchoragePenetration is greater for
waterStorage area for food made
by photosynthesis
Different type of Roots
B. Fibrous RootsMany finely branched
secondary rootsShallow roots cover a
large areaMore effective absorption of water and minerals
Roots hold the soil to prevent erosion
Different type of Roots
C. Aerial rootsClinging air roots
Short roots that grow horizontally from the stems
Roots that fasten the plant to a support
Absorptive air roots
Different type of Roots
Adventitious RootsDevelop in places other than nodes
Can form on cuttings and rhizomes
Roots
Root hairs: Tiny one celled hair like
extensions of the epidermal cells located near the tips of the roots where vascular tissues have formed.
Increase surface areaAbsorb water and
minerals from soil
Principal Tissues of the Leaf
EpidermisCuticle
Waxy substance covers the leaves and stems
Waterproof layer that keeps water in plants
Principal Tissues of the Leaf
Epidermis (cont)Stomata
Openings in the epidermis mainly located on underside of leaves
Exchange of gases
Principal Tissues of the Leaf
Epidermis (cont)Guard Cells
Two cells located on each side of stomata
Open and closes stomata
Principal Tissues of the Leaf
Mesophyll layerPalisade mesophyll
Primary site of photosynthesis
Spongy mesophyllContains air and chloroplasts
Site of photosynthesis and gas exchange
Principal Tissues of the Leaf
Veins or vascular bundlesIn spongy mesophyllPhloem tissues conduct
food from photosynthesis to rest of plant
Xylem tissues conduct water and minerals up to cells in leaves and stems
Parts of the Flower
SepalsOuter covering of the flower
budProtects the stamens and
pistils when flower is in bud stage
Parts of the Flower
PistilFemale reproductive partOvary
Enlarged portion at base of pistill
Produces ovules which develop into seeds
StigmaHolds the pollen grains
Parts of the Flower
StyleConnects the stigma with
ovarySupports the stigma so
that it can be pollinated